It really is.
The fact that this is pretty much the only point in the game where everybody's stats are too low to take two hits from it doesn't help anything. Any boss/enemy that used Water Blast after this weren't as annoying due to leveling up.
Also the fact that you just got out of two boss fights back to back in the sunken ship (which admittedly aren't that hard, but they can drain item resources).
The fact that this is pretty much the only point in the game where everybody's stats are too low to take two hits from it doesn't help anything. Any boss/enemy that used Water Blast after this weren't as annoying due to leveling up.
Also the fact that you just got out of two boss fights back to back in the sunken ship (which admittedly aren't that hard, but they can drain item resources).